Line-check.



W. H. FOWLER. mm ormofi. APPLICATION FILED OUT. 23, 1908.

918,988. I v Patented Apt. 20,1909.

INVENTOI? WITNESSES map If. Fowgz-ffi'.

A TTORNE Y8 or otherwise inoperative.

WI LLIAM H.,.FOWLE R, or sELMQALA AMA.

LINE-CHECK.

7 Specification of Letters Patent. Application filed center 23, 1908. Serial No. 459,141.

Patented April 20, 1909.

To all eoho rh it may concern: j Be it known that 1, WIL IAM H. FOWLER,

a citizen of the United States, and a resident of Selma, in thegc'ounty of Dallas and State of Alabama, have made certain new and useful Improvements in Line-Checks, of which the following is a specification.

This invention is an improved line check foruse, in connection with? injectors and boilers, and the invention consists .in certain novel constructions and combinations of parts as claimed.

,In the drawing-Figure 1 is a longitudinal section of my improved line check, as in use. Fig. 2 is a cross section thereofon about line 2-2'of Fig. 1'. 1 In the use of my invention my improved line check as shown in Fig. 1 is placed half way between the injector 1 and boiler, check 2, and the purposeis to provide a'sim le construction which will insure the -wqr ring of the injector when the boiler check isstuck As shown, my line check comprises a easing A having a chamber B which 1s widenedlaterally to permit the play of the ball (3 and i has its bottom wall provided in its upper side with a longitudinal channel B in which the ball rolls from end to end of the chamber B and-to which channel the.,ball will return by gravity. This chamber B affords at both sides of the ball passages for Water, and the ball can readily roll to and from its seat B at one endof the chamber B.. It will be noticed that the base of the chamber B inclines downwardly toward the seat B so that the ball will roll by gravity to the position shown in Fig.1, and will thus be seated at all times except when the injector is at work. The ball. is preferably made hollow and out of brass about one fourth of an inch thick, being thus more-sensitive than a solid ball, and it is also preferred to nu w the cage or casing A of" brass. At the oth 0nd of the chamber, I provide a strainer I) in the form of a perforated cylinder projecting into the end of the chamber B opposite the valve seat 13 so that water may pass around the ball C to the strainer D and. thence to the boiler. strainer D is held in place I ll; its end flange D fitting against a shoulder in the casing A E screw- The end plate D of the strainer is formed with a concave seat D and when the injector will be hereinafter described and' tially as set forth;

strainer, as indicated in dotted lines, Fig. 1, and rest in the said seat and be thus held stationary until theinjector is shut oil when the ballfwill drop back to'its seat as shown in-Fig. 1. j

When theboiler check sticks, the boiler pressure can only pass against the ball 0 forcing the same to 1ts seat so that it will not affect the injector, as the injector will go to work anytime, with boilercheck stuck up, when the form of ploved.

As sug ested, the casing is formed to provide amp e Water'space Within its chamber line check shown is em put on the ball will roll up against the B, and the branch p1pes may be conveniently '1 connected with the o posite ends of the casing in coupling up t 1e linecheck with the injector and boiler check as shown in Fig. 1 as before ,described.

1. A line check substantially'as herein described comprising acasing havinga chamber provided at one end with a valve seat and-the said chamber being extended laterally and vertically, a ball 0 crating in said chamber to and from the ba 1 seat ando'f a diameter less'than the lateral and vertical diameter of the interior of the chamber whereby to afford water space, and a'strainer in the other 1 end of the casing and having a tubular portion projecting intothe chamber substan- 2. A linecheck comprising a casing having a ball chamber and provlded at one end with a valve seat and at its other end with a strainer, and aball in the chamberbetween the valve seat and strainer and movable thereln between the valve seat, and the stralner and against one or the other of said parts in the different positions of the ball v substantially as set forth.

3. A line check comprising a casing having a-chamber provided at one end thereof with a valve seat, a strainer at the other end of the casing, and a ball valve in the chamber between the strainer and valve seat and movable toward and from said seat, substantially as set forth.

4. A line check substantially as herein described comprising a cage or casing having a valve seat atone end, and a stralner at its with a concave seat and the bottom of the cage or casing inclining downwardly toward the valve seat, anda valve movable in the 1 other end, the said strainer being provided cage or casing between the valve seat and the strainer and seating in one osition in the concave seat of the strainer, a l substantially as and for the purposes set forth.

5. Aline check comprising a casing having a chamber and a valve seat at one end thereof, a strainer in the other end of the chamberand having a concave seat facing toward the valve seat and a ball valve in the chamber and movable between and against the valve seat and the strainer seat, substantially as set forth.

6. A line check substantially as described, comprising a casing having a chamber and provided at oneend thereof with a valve seat 1 5 and having in the bottom of said chamber a longitudinal channel extending in the direction of the valve seat, the chamber being ex tended laterally on opposite sides of the said longitudinal channel, a strainer at the other end of the chamber from said valve seat and a ball in the chamber and movable in the longitudinal channel thereof toward and from the valve seat, sustantially as set forth.

WILLIAM, H. FOWLER. Witnesses:

J. S. Hirr'ri, O. S. LUMsnEN. 

